[monitoring-plugins] maint-2.1 branch created

[Git Repository]

 Module: monitoring-plugins
 Branch: maint-2.1
   SHA1: 5a9ca0590f847ef96421912bd2562292580a7d7c
    URL: 
https://www.monitoring-plugins.org/repositories/monitoring-plugins/log/?id=refs/heads/maint-2.1

The maint-2.1 branch has been created.